I have both books. The new one has added more foods and also stresses exercise - interval training specifically. One of these days, I'll sit down and compare the two. If I weighed my stack of diet books, I bet they'd weigh as much as I need to lose!

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Change isn’t easy. But if you don’t change, you stay the same, and where’s the fun in that?

I have both books, too. I always use the "Supercharged" version as my reference for the specifics of allowed foods on P1 and P2, since I know there have been changes.

"Supercharged" has a much more indepth discussion about our health in general, and I like the chapter about belly fat (which I have alot of.)

On the other hand, the original book has a chapter titled "Why Do People Occasionally Fail on This Diet?" which I think is a must read-especially now that I'm 6 months in and am experiencing slower weight loss.

So, hands up, for a serious "Beacher" I think both books are invaluable. I found the old version at a thrift store several months ago.